PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/21-23:58:10
G08     293.1          23.4               12.3 +/-    1.51      24.9 +/-    1.51  0.050 / 0.110
G10     2.5            63.0               10.5 +/-    0.77      11.7 +/-    0.77  0.050 / 0.110
G14     229.2          46.9               15.6 +/-    0.81      20.5 +/-    0.81  0.050 / 0.110
G18     61.6           52.0               11.8 +/-    0.63      14.5 +/-    0.63  0.050 / 0.100
G21     145.2          40.1               15.5 +/-    1.55      22.6 +/-    1.55  0.030 / 0.040
G24     58.5           27.2               10.3 +/-    0.46      19.2 +/-    0.46  0.040 / 0.040
G27     253.9          32.0               13.8 +/-    1.55      23.2 +/-    1.55  0.070 / 0.110
G32     242.0          63.6               13.8 +/-    0.35      15.2 +/-    0.35  0.060 / 0.080